flower
Đáp án + Giải thích các bước giải:
Phương trình hóa học :
Na2CO3 →to Na2O + CO2↑
Hệ số cân bằng 1 : 1 : 1
Na2CO3⟶t∘Na2 O+CO2 ↑
Choose the best answer.
I think you should buy _____ pack of mineral water instead. And you can also buy _____ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ______ cookies and soft candies.
We should decorate our living room with _____ orange banner. We also need ________ ribbons, balloons, party hats and costume.
I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.